Fitness Influencer Stephanie Buttermore Dies at 36
March 8, 2026·about 2 hours ago·via Us Weekly

Heartbreaking news from the fitness world - beloved influencer and PhD researcher Stephanie Buttermore has suddenly passed away at 36, her fiancé Jeff Nippard announced on social media Friday. Known for her YouTube videos on nutrition, body positivity, and her "All In" challenge where she ate 10,000 calories a day to promote healthy weight gain, Stephanie touched millions with her honest talks on eating disorders and mental health. Read more about this...
